Closed-type rotary hydraulic system for crane and crane

A hydraulic system and crane technology, which is applied in the field of closed rotary hydraulic system, can solve problems such as the large number of hydraulic pipelines and control components, the impact of start, stop and rotary process, and the complexity of the closed system, so as to achieve ideal rotary effect, Effects of improving reliability and simplifying the operation process

Active Publication Date: 2011-11-02
SANY AUTOMOBILE HOISTING MACHINERY
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The closed system realizes the stable control of the rotation through the closed variable variable pump and the two-speed valve group. Although it can meet the requirements of the crane to a certain extent, there are still certain impacts during the start, stop and rotation process, and it cannot Avoid instantaneous impact caused by load mutation
[0015] In addition, the closed system is too complic

Method used

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  • Closed-type rotary hydraulic system for crane and crane
  • Closed-type rotary hydraulic system for crane and crane
  • Closed-type rotary hydraulic system for crane and crane

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Embodiment Construction

[0036] The core of the present invention is to provide a crane closed rotary hydraulic system. The hydraulic system has very reliable and stable performance in the process of starting, stopping and turning, and the hydraulic structure is relatively simple.

[0037] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Please refer to figure 2 , figure 2 It is the hydraulic principle diagram of the closed slewing hydraulic system of the crane provided by the present invention.

[0039] In a specific embodiment, the crane closed rotary hydraulic system provided by the present invention includes a closed hydraulic pump 10 and a rotary motor 20, the oil outlet of the closed hydraulic pump 10 is connected with the oil inlet of the rotary motor 20, and the rotary The oil outlet of the m...

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Abstract

The invention discloses a closed-type rotary hydraulic system for a crane. The system comprises a closed-type hydraulic pump (10) and a rotary motor (20), wherein an oil outlet of the closed-type hydraulic pump (10) is connected with an oil inlet of the rotary motor (20); and an oil outlet of the rotary motor (20) is connected with an oil inlet of the closed-type hydraulic pump (10). The system is characterized by further comprising a buffering damper (30), and the buffering damper (30) is connected in parallel with the rotary motor (20) on a hydraulic oil line. The system has very reliable stability in the starting, stopping and rotating processes, and also has a smaller hydraulic structure. The invention also discloses a crane which is provided with the closed-type rotary hydraulic system.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a closed rotary hydraulic system of a crane. The invention also relates to a crane provided with said closed slewing hydraulic system. Background technique [0002] A crane is a kind of construction machinery that uses a boom to lift heavy objects during work, and then relies on the turntable to rotate the heavy objects from one position to another. [0003] The slewing mechanism is a device for the slewing part of the crane to realize slewing motion relative to the non-swinging part. The function of the slewing mechanism is to make the upper part of the car rotate around the slewing center of the crane, and connect the upper car and the lower car in the form of rolling support. Integral, so that the load on the vehicle is transmitted to the chassis frame, and its dynamic characteristics directly affect the working characteristics of the entire crane. [0004] The...

Claims

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Application Information

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IPC IPC(8): B66C23/86
CPCB66C23/86
Inventor 禹阳华程度旺双志
Owner SANY AUTOMOBILE HOISTING MACHINERY
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